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Stippy

A simple weighted voronoi stippler in Python

Stippy is a CLI tool that can vectorize images using stippling, which can prove useful for technical artists using Plotters or Laser engraving. It is based on this paper.

Installation

In a virtual env run:

pip install -r requirements.txt
pip install -e .

Use

In a shell, run:

python main.py input.jpg

Options

You can control some parameters using the following flags:

  • -lr controls the learning rate. Higher numbers means a potentially quicker convergence but migh also cause instability.
  • -n controls the number of iterations of the Lloyds algorithm to perform. Higher means yields a potentially better result at a cost of compute time.
  • -p controls the number of stippling points to use.
  • -w controls the number of workers to use in the KDTree.
  • -inv inverts the image.

For example:

python main.py input.jpg -lr 20 -n 100 -p 10000 

Will compute 100 iterations of the Lloyds algorithm with 10000 stipple points and a learning rate of 20.

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